Cyclopropanation of dimethyl fumarate and maleate with gem-dihalides catalyzed by Co (0)-or Ni (0)-complex and zinc.

H Kanai, Y Nishiguchi, H Matsuda

Index: Kanai; Nishiguchi; Matsuda Bulletin of the Chemical Society of Japan, 1983 , vol. 56, # 6 p. 1592 - 1597

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Citation Number: 16

Abstract

The reaction of bis (acetonitrile) bis (diethyl fumarate) cobalt (0) with dibromomethane gave diethyl trans-1, 2-cyclopropanedicarboxylate in a 67% yield based on the cobalt complex. Dimethyl cis-1, 2-cyclopropanedicarboxylate was obtained in a 52% yield from the reaction of dimethyl maleate with dibromomethane in the presence of acetonitrilebis (dimethyl maleate) nickel (0) accompanied by the formation of the trans-isomer in a 14% yield. The ...